Free Online Tools

Track daily work times and calculate weekly hours, overtime, and pay

Estimate overtime pay from an hourly rate, overtime hours, and multiplier

Estimate annual, monthly, and biweekly pay from an hourly rate and schedule

Calculate restaurant tips, tax, total, and split bills

Estimate the value of principal, recurring contributions, and compound growth

Calculate simple interest and the maturity amount from principal, annual rate, and term

Calculate sale prices, savings, tax, and the final purchase total

Calculate tax and the final price from a pre-tax amount, or back tax out of a tax-inclusive price.

Estimate payments, interest, and total repayment with level payment or equal principal methods

Estimate how long a fixed monthly payment takes to clear one debt, or the payment needed for a target payoff date.

Estimate months to a savings target with a starting balance, monthly contribution, and fixed annual rate, or find the monthly amount needed.

Estimate profit, return, and annualized return from investment, ending value, and time

Estimate trip fuel costs from distance, MPG, and gas price per gallon

Calculate BMI, a weight range, and adult reference categories from height and weight

Estimate adult basal metabolism and daily maintenance calories at different activity levels

Calculate percentages, increases, decreases, and the rate of change between two numbers

Calculate weighted GPA and total credits from course credits and grades

Calculate a weighted course grade and estimate the score still needed on remaining work

Convert miles, feet, pounds, Fahrenheit, and common volume units

Calculate the mean, median, mode, and range of a set of numbers

Calculate population and sample standard deviations, variances, and coefficient of variation

Quickly sum, average, and count multiple numbers

Add, subtract, multiply, and divide fractions; simplify; convert between fractions and decimals

Simplify a ratio, solve an equivalent ratio, or split a total into proportional shares.

Calculate the area of circles, triangles, trapezoids, and other shapes, plus the volume of cubes, cylinders, and more

Estimate concrete volume, cubic yards, and ready-mix bags for a slab, footing, or column.

Calculate running, walking, and cycling pace from time, distance, or speed

Generate random numbers by range and count

Calculate age, total days, the next birthday, and the interval between two dates

Calculate date intervals, business days, inclusive days, and date arithmetic

Find the best overlapping meeting time across multiple time zones

Convert between Unix timestamps and local date time.

Count Chinese characters (Hanzi), English words, and paragraphs

Convert between casing styles like camelCase, snake_case, and kebab-case

Remove duplicate lines, clear blank lines, and preserve original order

Find and replace text in bulk, with regular expression support

Sort text lines ascending, descending, or randomly

Encode and decode text as Morse code

Format, minify, and validate JSON data in your browser.

Encode and decode Base64 text instantly.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes.

Encrypt and decrypt text locally with AES

Inspect a JWT header, payload, and expiry locally

Compare two JSON documents locally to see added, removed, and changed fields

Safely encode and decode URLs and special characters.

Parse a URL’s protocol, domain, path, and query parameters

Pick colors and convert between popular color formats.

Pick colors from any image — HEX, RGB, HSL and a dominant palette

Remove the visible Gemini watermark from AI images in your browser. Nothing is uploaded.

Test regular expressions with clear match highlighting.

Create downloadable QR codes from text and common templates.

Decode QR code content from an image

Generate strong, customizable random passwords.

Generate UUID / GUID values in bulk

Infer TypeScript types from JSON

Parse a cron expression and list upcoming run times

Calculate subnet details from an IPv4 address and CIDR prefix

Convert integers between binary, octal, decimal, hexadecimal, and other bases